diff --git a/Cargo.toml b/Cargo.toml
index 296d46d..597201d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -16,13 +16,14 @@ repository = "https://github.com/leontoeides/indicium"
 maintenance = { status = "actively-developed" }
 
 [features]
-default = [ "simple", "fuzzy" ]
+default = [ "simple", "fuzzy", "ahash" ]
 simple = []
 fuzzy = [ "strsim" ]
+ahash = [ "dep:ahash" ]
 select2 = [ "simple", "serde" ]
 
 [dependencies]
-ahash = "0.8"
+ahash = { version = "0.8", optional = true }
 kstring = "2.0"
 serde = { version = "1.0", features = [ "derive" ], optional = true }
 strsim = { version = "0.10", optional = true }
diff --git a/src/simple/insert.rs b/src/simple/insert.rs
index e84495b..392a921 100644
--- a/src/simple/insert.rs
+++ b/src/simple/insert.rs
@@ -1,4 +1,10 @@
+// Conditionally select hash map type based on feature flags:
+#[cfg(feature = "ahash")]
 use ahash::HashSet;
+#[cfg(not(feature = "ahash"))]
+use std::collections::HashSet;
+
+// Static dependencies:
 use crate::simple::{indexable::Indexable, search_index::SearchIndex};
 use kstring::KString;
 use std::collections::BTreeSet;
diff --git a/src/simple/internal/indexable_keywords.rs b/src/simple/internal/indexable_keywords.rs
index dbf7bdd..93f8f02 100644
--- a/src/simple/internal/indexable_keywords.rs
+++ b/src/simple/internal/indexable_keywords.rs
@@ -1,4 +1,10 @@
+// Conditionally select hash map type based on feature flags:
+#[cfg(feature = "ahash")]
 use ahash::HashSet;
+#[cfg(not(feature = "ahash"))]
+use std::collections::HashSet;
+
+// Static dependencies:
 use crate::simple::internal::string_keywords::SplitContext;
 use crate::simple::{Indexable, SearchIndex};
 use kstring::KString;
diff --git a/src/simple/internal/search_top_scores/mod.rs b/src/simple/internal/search_top_scores/mod.rs
index bad18a4..bef31d1 100644
--- a/src/simple/internal/search_top_scores/mod.rs
+++ b/src/simple/internal/search_top_scores/mod.rs
@@ -9,7 +9,13 @@ mod with_capacity;
 
 // -----------------------------------------------------------------------------
 
+// Conditionally select hash map type based on feature flags:
+#[cfg(feature = "ahash")]
 use ahash::HashMap;
+#[cfg(not(feature = "ahash"))]
+use std::collections::HashMap;
+
+// Static dependencies:
 use std::{cmp::Ord, hash::Hash};
 
 // -----------------------------------------------------------------------------
diff --git a/src/simple/internal/search_top_scores/with_capacity.rs b/src/simple/internal/search_top_scores/with_capacity.rs
index c279d5c..e4aaf58 100644
--- a/src/simple/internal/search_top_scores/with_capacity.rs
+++ b/src/simple/internal/search_top_scores/with_capacity.rs
@@ -1,4 +1,10 @@
+// Conditionally select hash map type based on feature flags:
+#[cfg(feature = "ahash")]
 use ahash::{HashMap, HashMapExt};
+#[cfg(not(feature = "ahash"))]
+use std::collections::HashMap;
+
+// Static dependencies:
 use crate::simple::internal::SearchTopScores;
 use std::{cmp::Ord, hash::Hash};
 
diff --git a/src/simple/internal/strsim_top_scores/mod.rs b/src/simple/internal/strsim_top_scores/mod.rs
index fef3830..7f93b92 100644
--- a/src/simple/internal/strsim_top_scores/mod.rs
+++ b/src/simple/internal/strsim_top_scores/mod.rs
@@ -9,7 +9,13 @@ mod with_capacity;
 
 // -----------------------------------------------------------------------------
 
+// Conditionally select hash map type based on feature flags:
+#[cfg(feature = "ahash")]
 use ahash::HashMap;
+#[cfg(not(feature = "ahash"))]
+use std::collections::HashMap;
+
+// Static dependencies:
 use kstring::KString;
 use std::collections::BTreeSet;
 use std::{cmp::Ord, cmp::PartialOrd, hash::Hash};
diff --git a/src/simple/internal/strsim_top_scores/with_capacity.rs b/src/simple/internal/strsim_top_scores/with_capacity.rs
index 6287bed..29e4451 100644
--- a/src/simple/internal/strsim_top_scores/with_capacity.rs
+++ b/src/simple/internal/strsim_top_scores/with_capacity.rs
@@ -1,4 +1,10 @@
+// Conditionally select hash map type based on feature flags:
+#[cfg(feature = "ahash")]
 use ahash::{HashMap, HashMapExt};
+#[cfg(not(feature = "ahash"))]
+use std::collections::HashMap;
+
+// Static dependencies:
 use crate::simple::internal::StrsimTopScores;
 use std::{cmp::Ord, cmp::PartialOrd, hash::Hash};
 
diff --git a/src/simple/remove.rs b/src/simple/remove.rs
index 810342c..29f3f34 100644
--- a/src/simple/remove.rs
+++ b/src/simple/remove.rs
@@ -1,4 +1,10 @@
+// Conditionally select hash map type based on feature flags:
+#[cfg(feature = "ahash")]
 use ahash::HashSet;
+#[cfg(not(feature = "ahash"))]
+use std::collections::HashSet;
+
+// Static dependencies:
 use crate::simple::{indexable::Indexable, search_index::SearchIndex};
 use kstring::KString;
 use std::{clone::Clone, cmp::Ord};